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Staghorn calculi (also sometimes called coral calculi) obtain their characteristic shape by forming a cast of the renal pelvis and calices, thus resembling the horns of a stag.  The vast majority of staghorn calculi are radiopaque and appear as branching calcific densities overlying the renal outline and may mimic an excretory phase IVP. Lamination within the stone is common.  Read more: http://radiopaedia.org/articles/staghorn-calculus

Staghorn calculi (also sometimes called coral calculi) obtain their characteristic shape by forming a cast of the renal pelvis and calices, thus resembling the horns of a stag. The vast majority of staghorn calculi are radiopaque and appear as branching calcific densities overlying the renal outline and may mimic an excretory phase IVP. Lamination within the stone is common. Read more: http://radiopaedia.org/articles/staghorn-calculus

ackstone calculus is the name assigned to the appearances of a sub-set of urinary tract calculi. These calculi have a jagged irregular edge, that resemble the appearance of traditional toy jacks. The calculi have a very dense central core component with bony spicules radiating outwards, hence the name. http://radiopaedia.org/articles/jackstone-calculus/edit

ackstone calculus is the name assigned to the appearances of a sub-set of urinary tract calculi. These calculi have a jagged irregular edge, that resemble the appearance of traditional toy jacks. The calculi have a very dense central core component with bony spicules radiating outwards, hence the name. http://radiopaedia.org/articles/jackstone-calculus/edit

The urethra is the terminal segment of the urinary system.  Stones can be lodged here and causes severe pain.  http://radiopaedia.org/articles/urolithiasis

The urethra is the terminal segment of the urinary system. Stones can be lodged here and causes severe pain. http://radiopaedia.org/articles/urolithiasis

Puncture needle for nephrostomy insertion for an infected system secondary to proximal ureteric stone seen on the control image.  Urolithiasis refers to the presence of calculi anywhere along the course of the urinary tracts. For the purpose of the article the terms urolithiasis, nephrolithiasis and renal or kidney stones are used interchangeably.  Read more: http://radiopaedia.org/articles/urolithiasis

Puncture needle for nephrostomy insertion for an infected system secondary to proximal ureteric stone seen on the control image. Urolithiasis refers to the presence of calculi anywhere along the course of the urinary tracts. For the purpose of the article the terms urolithiasis, nephrolithiasis and renal or kidney stones are used interchangeably. Read more: http://radiopaedia.org/articles/urolithiasis

Horseshoe kidneys are the most common type of renal fusion anomaly (see developmental renal anomalies). They render the kidneys susceptible to trauma and are an independent risk factor for the development of renal calculi and transitional cell carcinoma of the renal pelvis. A horseshoe kidney is formed by fusion across the midline of two distinct functioning kidneys, one on each side of the midline. Read more: http://radiopaedia.org/articles/horseshoe_kidney

Horseshoe kidneys are the most common type of renal fusion anomaly (see developmental renal anomalies). They render the kidneys susceptible to trauma and are an independent risk factor for the development of renal calculi and transitional cell carcinoma of the renal pelvis. A horseshoe kidney is formed by fusion across the midline of two distinct functioning kidneys, one on each side of the midline. Read more: http://radiopaedia.org/articles/horseshoe_kidney

. Horseshoe kidneys are the most common type of renal fusion anomaly (see developmental renal anomalies). They render the kidneys susceptible to trauma and are an independent risk factor for the development of renal calculi and transitional cell carcinoma of the renal pelvis. This case has a dysplastic left component. Read more: http://radiopaedia.org/articles/horseshoe_kidney

. Horseshoe kidneys are the most common type of renal fusion anomaly (see developmental renal anomalies). They render the kidneys susceptible to trauma and are an independent risk factor for the development of renal calculi and transitional cell carcinoma of the renal pelvis. This case has a dysplastic left component. Read more: http://radiopaedia.org/articles/horseshoe_kidney

Primary bladder calculi, in otherwise normal bladders, were previously common, but are now very uncommon in western nations. When encountered, the most common cause is due to urinary stasis, including from: bladder outlet obstruction cystocoele neurogenic bladder foreign body http://radiopaedia.org/articles/bladder-calculus-1

Primary bladder calculi, in otherwise normal bladders, were previously common, but are now very uncommon in western nations. When encountered, the most common cause is due to urinary stasis, including from: bladder outlet obstruction cystocoele neurogenic bladder foreign body http://radiopaedia.org/articles/bladder-calculus-1

Bladder calculi occur either from migrated renal calculi or urinary stasis. Bladder calculi can be divided into primary and secondary stones:  primary: stones form de novo in the bladder secondary: stones are either from renal calculi which have migrated down into the bladder, or from concretions on foreign material (e.g. urinary catheters)  https://radiopaedia.org/articles/bladder-calculus-1

Bladder calculi occur either from migrated renal calculi or urinary stasis. Bladder calculi can be divided into primary and secondary stones: primary: stones form de novo in the bladder secondary: stones are either from renal calculi which have migrated down into the bladder, or from concretions on foreign material (e.g. urinary catheters) https://radiopaedia.org/articles/bladder-calculus-1

Ureteritis cystica or pyeloureteritis cystica is a benign condition of the ureters representing multiple small submucosal cysts. It results from chronic urinary tract irritation, due to stones and / or infection. The appearance is that of multiple small 2 - 5mm smooth walled rounded lucent filling defects projecting into the lumen, usually of the ureter. Read more: http://radiopaedia.org/articles/ureteritis-cystica

Ureteritis cystica or pyeloureteritis cystica is a benign condition of the ureters representing multiple small submucosal cysts. It results from chronic urinary tract irritation, due to stones and / or infection. The appearance is that of multiple small 2 - 5mm smooth walled rounded lucent filling defects projecting into the lumen, usually of the ureter. Read more: http://radiopaedia.org/articles/ureteritis-cystica

A perinephric abscess may result due to rupture of a renal abscess into the perirenal space, but usually it develops directly from acute pyelonephritis. However, any inflammatory process outside the Gerota's fascia may also result in perinephric abscess. Such kind of abscesses have been seen quite frequently in diabetic patients with calculi and in patients with septic emboli.    Read more: http://radiopaedia.org/articles/perinephric-abscess

A perinephric abscess may result due to rupture of a renal abscess into the perirenal space, but usually it develops directly from acute pyelonephritis. However, any inflammatory process outside the Gerota's fascia may also result in perinephric abscess. Such kind of abscesses have been seen quite frequently in diabetic patients with calculi and in patients with septic emboli. Read more: http://radiopaedia.org/articles/perinephric-abscess

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